Geoege wilton baetlett



lUNiTEo' STATES PATENT OFFICE.

GEORGE WILTON BARTLETT, OF CLIFTON FORGE, VIRGINIA.

LUBRICATOR.

SPECIFICATION forming part of Letters Patent No. 375,310, dated December 20, 1887 Application filed December 24, 1886. Serial No. 222,436. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE WILTON BART- LETT, a citizen of the United States, residing at Clifton Forge, in the county of Alleghany and State of Virginia, have invented certain new and useful Improvements in Lubricators;

and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to that class of lubricators commonly called force-feed lubricators, and is particularly designed to be used for lubricating the cylinders of an engine and of air-pumps when necessary.

The object of my invention is to simplify the construction of this class of devices, so that they can be cheaply made and sold for ordinary use upon all kinds of engines, those now in use being designed for engines of the higher class and large capacity.

My invention therefore consists of constructions and combinations, all as will hereinafter be described in the specification, and pointed out in the claims, reference being had to the accompanying drawings, in which Figure 1 represents the device partially in elevation and partially in section, and Fig. 2 a front elevation.

A represents the oil cup or cylinder having heads A and AZwhich are secured thereto in any suitable manner, preferably by screws a", the heads of'which are shown in the figures. In the upper side of the cylinder is a funnel, a, closed tight-1y when in use by a cap, a, for filling the oil-cup. The interior of the cylinder is bored out in the same manner as a steamcylinder, and is provided with 'a piston, A", made of any suitable material. In the present instance the piston is formed of a cup, a and a follower, a", havingpacking-rings a, which expand and hold the piston in place. In front of the piston is a spring, B, having one end resting against the head A and the other against a plate, a, on the head of the piston. The object of this spring is to partially coun: teract the pressure of the steam, and also to force the head back when the steam-pressure has been removed from the piston, so that the cup can be filled at any time. The spring is preferably conical, so that as the steam-press ure forces the piston toward the head ample room will be had in the cylinder for the in creased diameter of the coils, which increase is caused by the shortening of the distance be tween the coils.

Head A is provided with a steam-supply pipe, 0, which opens into the cylinder back of the piston A which with the head A formsa 6o steam-chamber, from which the water of condensation passes through a waste-pipe, a", fitted in the lower part of the head A.

The front head, A is provided with an oilexit pipe, D, having any number of branches 6 D; but in the present instance only two are shown, and these lead to the cylinders of the engines; Each pipe is provided with a globevalve, (1, which regulates the flow of oil from the reservoir through each pipe.

The operation of the deviceis as follows: The parts being in the position shown in Fig. 1, the oil is poured through the funnel a into the cylinder A and the top of the funnel screwed into place. Steam is now admitted to the steamchamber through pipe 0 and forces the piston toward the front end. The globe-valves are now opened the required distance and the oil is forced into the cylinder in any quantity desired. If it be desired to'fill the cylinder with oil while running, the steam is cut off in pipe 0 by cock 0, Fig. 3, and the waste-cock opened to allow the steam in the cylinder or steamchamber to be forced out by the expansion of the spring B. Assoon as the cup is filled, the steam is turned on and the waste-pipe closed, and the action or" the lubricator goes on as before.

It will be noted that the piston has no rod, and that no special means are required to ad mit the steam. This construction adds greatly to the simplicity of the device and consequent cheapness in manufacturing. I

I am aware that lubricators formed of a cylinder divided into two parts by a piston to form steam and oil chambers, said piston being provided with a piston-rod and said cylinderwith steam and oil supply pipes and steam and oil exits, and a coiled spring to force the piston back when the steam-pressure is removed, are old. My device differs from these in that I dispense with the guide-rod onthe piston and force the steam against the center of the piston, which is balanced by the pressure, which is equally distributed over the face of said piston. It also differs in that the heads and cylinder are made separately, and can therefore be readily and cheaply put together.

Vhat I claim as new is 1. In a force-feed lubricator, the combination of a cylinder having a funnel or feed-tube provided with a cap, a head, A, having a steam-pipe concentric with the bore of the cylinder and a relief-pipe on the same plane as the inner wall of the cylinder, ahead, A having the oil-escape pipe, a piston having its center opposite the steam-pipe, and a spring located between the piston-head and head A substantially as described.

2. In a force-feed lubricator, the combination of a cylinder having a funnel or feed-tube provided with a cap, a head, A, having a steam-pipe concentric with the bore of the cylinder and a relief-pipe on the same plane as the inner wall of the cylinder, a head, A having the oil-escape pipe, a piston having its center opposite the steam pipe, and a conical spring located between the head of the piston and the head A", substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE W'ILTON BARTLETT.

Vitnesses:

M. F. HALLECK, l J. W. G. BRYANT, Jr. 

